Support for the Northern Ireland Protocol is "edging up", according to the findings of the latest poll on the post-Brexit trading arrangements.

And while a majority see it as an economic opportunity, many remain deeply concerned about its impact on political stability.

A row over the protocol has led to the collapse of the Stormont Assembly and Executive with the DUP refusing to re-enter power-sharing until its concerns are addressed.

They say it is undermining the union and Northern Ireland’s place in the UK’s internal market.

55% of respondents to a Queen’s University survey believe the protocol is an appropriate way to manage the impact of Brexit on Northern Ireland - up from 47% a year ago.

But a majority of those polled - 55% - have concerns about the implications were the grace periods, which smooth the current application of the protocol, to end.

The biggest worry people have is what that might mean for delivery of parcels from Great Britain, followed by possible restrictions on plants and seeds.

And 46% of people who took part think the protocol is having a negative impact on Northern Ireland’s place in the United Kingdom, including the UK’s internal market.

That is down somewhat on previous polls but remains significant.

The UK government is the most distrusted party in the current dispute, according to 84% of respondents.

And 57% of those who took part believe there is no justification for it taking the current unilateral approach via planned Westminster legislation to set aside large parts of the protocol.

Professor Katy Hayward, who helped analyse the findings, said people in Northern Ireland had strong, often divided views on the protocol.

"But one of the things that they agree most on (77%) is that the UK and EU should jointly present factual information on the protocol.

"The lack of agreement from the UK and EU as to the actual meaning and problems of the protocol is clearly exacerbating the divisive effects of the topic on the ground in Northern Ireland."

Her colleague Professor David Phinnemore said people in Northern Ireland continued to have genuine concerns about what the full operation of the protocol would mean.

"Yet this latest polling also shows support for the protocol edging upwards and almost two-thirds of respondents seeing economic opportunities in it."

Just over half of respondents - 52% - believe Northern Ireland's MLAs should vote to continue the arrangement when they are asked in two years' time. 40% would prefer them to vote it down.

The poll is the fifth in a series conducted by Lucid Talk on behalf of Queen’s University that tracks public opinion on the protocol.

It was conducted between 3-6 June from a weighted sample of 1,497 respondents.

55% of those polled believe the protocol is having a positive effect on the Northern Ireland economy with 65% believing it offers unique economic opportunities.

By contrast, the biggest concerns are for the political implications of the current row over its operation.

59% of those who took part believe the protocol is having a negative impact on political stability and on British-Irish relations.